Neglectful husband Hugh Varley learns that his wife, Denise, is infatuated with philanderer Frank Despard. She enters Frank's apartment to recover some incriminating letters and makes a quick exit, unaware that the occupant is subsequently murdered. Denise seeks refuge in the apartment of Cort Maitland, who knows of her affair with Frank. Hugh later comes to his wife's defense when Cort attempts burglary and assault. In the struggle, Cort accidentally shoots himself and confesses to murdering Frank before he dies.